Disinfectant.



UNITED STATES PATENT OFFICE.

KARL LUDWIG- VALENTIN ZIMMER, F HAMBURG, GER MANY.

DISINFECTANT.

No Drawing.

formaldehyde and consequently their disinfecting properties unaltered for a long time. The present invention has for its object, to overcome this difficulty.

According to the present process castor oil or other suitable vegetable oils are converted into sulfo-acids by means of sulfuric acid in a known manner, the latter is separated from the free .sulfuric acid, neutralized almost completely with alkali and concentrated. On theother hand a oaseinate solution is prepared, preferably by separat-- ing the casein from skimmed milk by means of rennet, washing and pressing and then dissolving it in borax solution. The caseinate solution is mixed with the almost neutralized and concentrated sulfoleate solution, after which formaldehyde is intro,- duced, preferably in the shape of a gas, until saturation. For example, 1000 kilos of oastor oil are saponified with 300 kilos of English sulfuric acid in a known manner, the sulfo-acid'bbtained is separated from the residue of free sulfuric acid, then almost neutralized by means of caustic soda solution of 38 Be, and finally concentrated by heating. 1000 kilos of the sulfoleate thus obtained are mixed with 500 kilos ofcaseinate solution obtained by separating the 100' parts of dried casein in asolution of 100 parts ofborax in 250 parts of water. Into I the solution of sulfoleate in the casein solu- Specification ofietters Patent.

Patented Nov. 28, 1911.

Application filed June 18, 1910. Serial No. 567,693.

as an efficient emulsifying medium for mineral oils, tar-oils, various lcinds of tar and resin oils, that is to say, for the manufacture of various kinds of oil-emulsions, which possess strong disinfecting properties andretain these properties unaltered for a long time. For preparing these water-soluble emulsions a quantity of the-above described mixture of sulfo-acid'and casein-preparation containing formaldehyde, equal in weight to about 3 to 5 per cent. of the oil to be emulsified, is introduced into a suitable receptacle provided with an agitator, after which the oil is caused to flow in gradually, while constantly stirring. In this manner a homogeneous product is obtained, which dissolves or emulsifies with water in any proportionand has powerful permanent disinfecting properties, inasmuch as volatilization or decomposition of the formaldehyde contained in the emulsion does not take place.

The principal advantage of the process lies in the fact, that the products obtained by the same retain their strong disinfecting properties undiminished even after a very long time. -The' emulsions or preparations thus obtained have a reliable effect, even when highly diluted, they penetrate the objects to be sterilized and are not obnoxious to the neighborhood by smell or other unpleasant properties. They are specially suitable forv sterilizing large surfaces, such as roads, open spaces, halls, schools, churches and other public resorts, and may be used generally for disinfection,-also for washing and other purposes.

What I claim is 1. The process for the manufacture of a permanent disinfectant containing formal- ;dehyde and capable of readily emulsifying permanent disinfectant containing formaldehyde and capable of readily emulsifying mineral oils, tar, tar oils and resin 011s,

which comprises preparing sulfo acid from" vegetable oil by means of sulfuric acid, nearly neutralizing the same, mixing the product with a caseinate solution and inmineral oils, tar, tar oil, resin oil, and similar oils which consists in mixing caseinatesolution with v a sulfo-acid obtained from vegetable oils by means of sulfuric acid and partly neutralized, introducing formaldehyde into the mixture, then gradually intro ducing said raw material into the said product and thoroughly mixing it with the latter, substantially as described.

In testimony whereof I have hereunto set 15 my hand in presence of two subscribing \Witness'es.

KARL LUDWIG VALENTIN ZIMMER.

Witnesses MOSE MILLER, MAX HESSE. 

